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 A073919 Smallest prime p with bigomega(p-1)=n, where bigomega(m)=A001222(m) is the number of prime divisors of m (counted with multiplicity). 4
 2, 3, 5, 13, 17, 73, 97, 193, 257, 769, 3457, 7681, 15361, 12289, 40961, 114689, 65537, 737281, 1376257, 786433, 5308417, 7340033, 14155777, 28311553, 104857601, 113246209, 167772161, 469762049, 2113929217, 1811939329 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS David W. Wilson and Robert G. Wilson v, Table of n, a(n) for n = 0..351 EXAMPLE a(2) = 5 = 2*2 + 1. a(5) = 73 = 2*2*2*3*3 + 1. MATHEMATICA ptns[n_, 0] := If[n==0, {{}}, {}]; ptns[n_, k_] := Module[{r}, If[nv, Return[v]]; minp=Min@@Select[l+1, ProvablePrimeQ]; If[minp

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Last modified May 16 12:46 EDT 2021. Contains 343947 sequences. (Running on oeis4.)